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sex

For discussing the functions of different structures of all organisms.

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sex

Postby ninad » Wed Dec 20, 2006 6:46 am

why does a mans penis stands upright when they are are attracted towards women?
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Postby sachin » Wed Dec 20, 2006 3:58 pm

Its natural reaction towards physical attraction.

ANIMAL BEHAVIOUR.
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Postby Oscerot » Wed Dec 20, 2006 6:28 pm

The sexes are attracted to one another for the reason of procreation. In order to procreate, the penis needs to be erect in order for it to be efficiently inserted into the vagina to make its deposit.
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Postby Schröder » Sun Dec 24, 2006 1:41 am

Hormones particularly testosterone and dopamine take effect causing the erectile tissue to fill with blood from the arteries. As the tissue fills, the increasing pressure seals off the veins that drain the penis causing it to engorge with blood.
There is grandeur in this view of life, with its several powers, having been originally breathed into a few forms or into one from so simple a beginning.....The Origin of Species
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Postby sachin » Sun Dec 24, 2006 7:16 pm

Nice go on more info.......
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Who says reason for world war IV will be Petrol?
Reason lies in two words "Me and Mine".
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